CN205123768U - DMX1000 standard digital interface communication control system - Google Patents
DMX1000 standard digital interface communication control system Download PDFInfo
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- CN205123768U CN205123768U CN201520949973.XU CN201520949973U CN205123768U CN 205123768 U CN205123768 U CN 205123768U CN 201520949973 U CN201520949973 U CN 201520949973U CN 205123768 U CN205123768 U CN 205123768U
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Abstract
The utility model provides a DMX1000 standard digital interface communication control system, including a main control unit and a plurality of controlled unit, passing signal medium main control unit connects gradually a plurality of controlled units, be provided with the difference unit between main control unit and controlled unit, the integration has the DMX1000 packet in the main control unit, this packet adopts DMX1000 standard signals, the main control unit can be network controller, lamp accuse keyboard, or other central controller, each controlled unit can be the controller, the LED landscape lamp, the LED display screen, driving motor. The utility model discloses installation easy maintenance, and it is compatible good, be applicable to most of communication protocol.
Description
Technical field
The utility model relates to a kind of communication control system, particularly relates to the communication control system that a kind of DMX1000 of employing standard digital interface carries out controlling, belongs to communication technical field.
Background technology
In recent years, the LED light source that can realize full-color change instead of neon light substantially, becomes the main product of landscape light in city.At present, the LED landscape lighting control system on market mainly contains following two types:
1) DMX512 parallel control system:
DMX512 is signal light control mode common on the market at present, the built-in a slice single-chip microcomputer of each LED lamp carries out controlling and is connected in EIA-485 bus, by a controller, each single-chip microcomputer in EIA-485 bus is controlled, the advantage of this control mode is technology maturation, realize simple, be widely used, shortcoming is: a, this control mode speed are only 256Kbps, port number is only 512, cannot be applied in medium-and-large-sized engineering and go, along with the demand of mega project increases day by day, improve speed increase stability and become trend of the times; B, can only adopt bus topolopy in parallel, the damage of a node can cause the paralysis of whole bus, fixes a breakdown more difficult.
2) serial SPI control system:
It uses the chip including offset buffer, latches data function, by the mode of similar shift LD, each LED pixel is joined end to end, deposits, then send the data of a byte downwards after receiving a byte data.The advantage of this control mode is: number of nodes is large, and general chip as this kind of in DM413 or LPD6803 can reach the number of nodes of more than 1000; Do not have the constraint of address, installation and maintenance is fairly simple, is applicable to very much the use of large-scale tv screen; But this control mode also has some shortcomings: a, communication distance are short, this control mode belongs to single-ended signal transmission, exists and is total to Earth noise and can not suppresses the problems such as common mode disturbances, make two contacts more than 5 ~ 10 meters, can not greatly limit its range of application; B, outlet are more, and because most of chip uses SPI mode, this just at least needs 3 control lines (clock, data, latch signal) and data ground wire, will make the design difficulty increasings such as waterproof and dustproof like this; C, standard cannot be unified, and because this kind of number of chips is numerous on the market, application layer standard is non-unification also, so cause various product cannot be compatible.
Summary of the invention
In order to solve the deficiencies in the prior art, the utility model provides one more at a high speed, more reliably and more flexibility and develop simple DMX1000 standard digital interface communication control system.
The purpose of this utility model realizes by the following technical solutions:
A kind of DMX1000 standard digital interface communication control system, comprise a main control unit and multiple controlled cell, multiple controlled cell is connected successively by signal media main control unit, difference unit is provided with between main control unit and controlled cell, logic level signal is converted to differential level signal and transmits by difference unit, be integrated with DMX1000 packet in main control unit, this packet adopts DMX1000 standard to send signal.
Described main control unit can be network controller, lamp controlled keyboard or other central controllers, controlled cell can be controller, LED landscape lamp, LED display or drive motors, communication media can according to factors such as site environment, controlled distance, costs, select different media, as EIA-485 interface, netting twine, light pricker etc., also can select different networking modes, in parallel or serial, difference unit is known discharge circuit or communication chip.
Working method of the present utility model is: main control unit sends logic level signal according to DMX1000 consensus standard, sends to controlled cell after being converted to unlike signal according to this logic level signal of difference of medium; Each controlled cell parses order according to the definition of agreement and the address of self definition, performs the control overflow of main control unit.
Owing to have employed above technical scheme, the utility model has following beneficial effect:
1, cascaded structure can being adopted also can to use parallel-connection structure, without the need to carrying out geocoding in cascaded structure, reducing the difficulty of installation and maintenance;
2, between main control unit and controlled cell, difference unit is set, transmits by logic level signal being converted to differential level signal, common Earth noise and common mode disturbances can be suppressed, thus considerably increase communication distance, and improve the reliability of communication;
3, compatible good, be applicable to most of communication protocols in the market.
Accompanying drawing explanation
Fig. 1 is the sequential chart of DMX1000 packet described in the utility model;
Fig. 2 is the utility model one cascaded structure block diagram;
Fig. 3 is the utility model one parallel-connection structure block diagram.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described and demonstrated
A kind of DMX1000 standard digital interface communication control system, comprise a main control unit and multiple controlled cell, multiple controlled cell is connected successively by signal media main control unit, difference unit is provided with between main control unit and controlled cell, logic level signal is converted to differential level signal and transmits by difference unit, be integrated with DMX1000 packet in main control unit, this packet adopts DMX1000 standard to send signal.
As shown in Figure 1, analyze according to computer language characteristic, DMX1000 packet comprises following a few part: no signal instruction (Idle or NoDMX), interrupt (Break), in to have no progeny mark (MarkAfterBreak or MAB), opening code (StartCode or SC), optical path information code interval mark (MarkTimeBetweenFrames or MTBF), optical path information code (ChannelData or CD), packet interval mark (MarkTimeBetweenPackets or MTBP), and DMX1000 standard has also made regulation to the time span of every part.
No signal instruction (Idle or NoDMX) is when exporting without DMX1000 signal instruction, and signal designation is in high level forever.
Interrupt (Break): 22us before DMX packet proceed-to-send signal, signal designation becomes low level, this just means and represents interruption between two groups of signals with 22, this time length of interrupting, under normal circumstances with designer be set with relation, between different devices may be different, but minimumly can not be less than 88ps.
In to have no progeny mark (MarkAfterBreak or MAB): and then interrupting is exactly 2 positions, i.e. a high level of 4us, and it indicates the end of interruption.
Opening code (StartCode or SC): opening code indicates the beginning of real information flow in packet, it tells that receiving equipment starts receiving light path control information, opening code is defined as light path 0, namely represent there is no optical path information, each optical path information code after opening code and the version of opening code are identical, all comprise a start bit and two position of rests, its time span is that there are strict requirements, is 11 positions (11us).
Opening code and optical path information code are made up of following a few part:
1) start bit (StartBit): it is made up of 1 position, shows as low level, its time span is 1us;
2) light path data bit (DataBits): its length is 8 bits (8us), 8 transmission characteristics that namely, we say, that is it can be used to the expression value that 0--255 these 256 is different in ten's digit;
3) position of rest (StopBits): it is made up of 2 positions, show as high level, its time span is 2us, when DMX1000 control signal completes once after the transmission of 1 to 2048 optical path information, remain from opening code when second time sends, that is will have an opening code in each packet.
(MarkTimeBetweenFrames or MTBF closes the information in order to distinguish each light path to optical path information code interval mark, the mark of a high level is added before the start bit of each light path control signal, its time span does not have concrete regulation, but the smaller the better.
Optical path information code (ChannelData or CD) was said before closing, and was exactly the control signal optical path information code of 1 to 2048 light paths after opening code.
Packet interval identify: when transfer one comprise the packet of 1 to 2048 light paths after, another packet is again from interruption (Breek), but, the mark of a high level will be increased between two packets, the length of identified time is not clear and definite, regulation, often according to the designing requirement of main control unit and engineering thereof.
Above-mentioned main control unit can be network controller, lamp controlled keyboard or other central controllers, and controlled cell can be controller, LED landscape lamp, LED display or drive motors.
Communication media according to factors such as site environment, controlled distance, costs, can select different media, as EIA-485 interface, netting twine, light pricker etc., also can select different networking modes, and in parallel or serial, as shown in accompanying drawing 2, accompanying drawing 3.
Difference unit is known discharge circuit or communication chip.
Embodiment one: for the control of street lamp
LED landscape lamp is in parallel successively and connect lamp controlled keyboard, and lamp controlled keyboard sends signal controlling LED landscape lamp by DMX1000 standard.
Claims (5)
1. a DMX1000 standard digital interface communication control system, is characterized in that, comprises a main control unit and multiple controlled cell, connects multiple controlled cell successively, be provided with difference unit between main control unit and controlled cell by signal media main control unit.
2. a kind of DMX1000 standard digital interface communication control system according to claim 1, is characterized in that, be integrated with DMX1000 packet in described main control unit.
3. a kind of DMX1000 standard digital interface communication control system according to claim 1, is characterized in that, described main control unit is network controller, lamp controlled keyboard or central controller.
4. a kind of DMX1000 standard digital interface communication control system according to claim 1, it is characterized in that, described controlled cell is controller, LED landscape lamp, LED display or drive motors.
5. a kind of DMX1000 standard digital interface communication control system according to claim 1, is characterized in that, communication media is EIA-485 interface, netting twine or light pricker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201520949973.XU CN205123768U (en) | 2015-11-24 | 2015-11-24 | DMX1000 standard digital interface communication control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520949973.XU CN205123768U (en) | 2015-11-24 | 2015-11-24 | DMX1000 standard digital interface communication control system |
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| CN205123768U true CN205123768U (en) | 2016-03-30 |
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| CN201520949973.XU Expired - Fee Related CN205123768U (en) | 2015-11-24 | 2015-11-24 | DMX1000 standard digital interface communication control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107072003A (en) * | 2017-04-13 | 2017-08-18 | 北京富润成照明系统工程有限公司 | The real-time self-checking feedback system of efficient lamp control |
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- 2015-11-24 CN CN201520949973.XU patent/CN205123768U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107072003A (en) * | 2017-04-13 | 2017-08-18 | 北京富润成照明系统工程有限公司 | The real-time self-checking feedback system of efficient lamp control |
| CN107072003B (en) * | 2017-04-13 | 2019-10-18 | 北京富润成照明系统工程有限公司 | The real-time self-checking feedback system of efficient lamp control |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160330 Termination date: 20181124 |